首页
登录
职称英语
[originaltext] Astronomers are still learning about sunspots and about their
[originaltext] Astronomers are still learning about sunspots and about their
游客
2023-09-13
46
管理
问题
Astronomers are still learning about sunspots and about their effects on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, are electrical in nature.
Sunspots vary in size from what appear to be small specks on the sun’s surface, to at least 90,000 miles long, and 200,000 miles in length, and are visible on most clear days.
When sunspots release their electrical energy, they shoot beams of negatively charged electrons into space, some of which escape into the Earth’s atmosphere. These electrons create electrical effects, such as the aurora borealis, or Northern Lights, cause the disruption of radio transmissions, and increase the amount of ozone in the upper atmosphere. The additional ozone may absorb more than the usual amount of the sun’s heat, which in turn may affect our weather.
The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots,
Records of sunspots have only been kept for the last 100 years or so, leaving astronomers with little to back their research and much yet to discover about this phenomenon.
选项
A、The number of sun flares.
B、The heat of the sun.
C、The sunspot cycle.
D、The weather.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3011257.html
相关试题推荐
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]ThereisastrangeareaintheAtlanticOceancalledtheBerm
[originaltext]M:Excuseme,areyouwaitingtobuyconcerttickets?W:Yes,Ia
[originaltext]M:Excuseme,areyouwaitingtobuyconcerttickets?W:Yes,Ia
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
[originaltext]Mostpeoplefeellonelysometimes.Butitusuallyonlylasts
随机试题
文化遗产指的是从过去继承而来,在当今保持下去,为未来存留不息的事物。[br][audioFiles]2018m8x/audio_etrktsj_20180
Afterhavingassuredtheirreturnjourney,thewriterandhiscompanioncould
StudyActivitiesinUniversityInordertohelpcoll
Sometimesthestudentmaybeaskedtowriteabouthis______toacertainbookor
散文集《雨天的书》的作者是()A.周作人 B.鲁迅 C.林语堂 D.朱自清
下列关于收集客户财务信息的具体步骤的说法中,错误的是()。A.理财师应消除自己
方差的平方是标准差。()
到底转产什么得赶紧定下来,作为厂长,办事更要()。否则就会失去大好时机。A.
20世纪80年代以后,商业银行的风险管理进人()。 A.全面风险管理模式阶段
关于企业质量管理体系文件的构成,下列说法正确的有( )。A.质量手册是质量管理
最新回复
(
0
)